Cita APA (7th ed.)

National Retired Teachers Association & American Association of Retired Persons. (1981). Learning about aging. American Library Association.

Cita Chicago (17th ed.)

National Retired Teachers Association i American Association of Retired Persons. Learning About Aging. Chicago: American Library Association, 1981.

Cita MLA (9th ed.)

National Retired Teachers Association i American Association of Retired Persons. Learning About Aging. American Library Association, 1981.